KR102523691B1 - Resin composition and molded object - Google Patents

Abstract

A resin composition containing aromatic polysulfone, liquid crystal polyester and a glass filler, wherein the content of boron oxide is less than 1.4% by mass with respect to the total mass of the resin composition.

Description

Resin composition and molded object {RESIN COMPOSITION AND MOLDED OBJECT}

The present invention relates to a resin composition and a molded article obtained using the same.

This application claims priority based on Japanese Patent Application No. 2015-128638 for which it applied to Japan on June 26, 2015, and uses the content here.

Conventionally, in various application fields such as electric and electronic parts, automobile parts, aircraft parts, and miscellaneous goods, thinning and miniaturization are progressing, and compositions containing plastics, ie, resin compositions, are preferably used as forming materials for these. Such a resin composition has improved processability in recent years, and opportunities to use it as a material for forming molded bodies, such as parts such as product casings and relatively large parts, where the appearance is likely to be a problem, are increasing.

For example, in automobile parts and aircraft parts, in many cases, the color taste is important in terms of color tone adjustment and design, but these parts change color when used for a long period of time, resulting in poor product appearance. may cause In addition, automobile parts and aircraft parts are required to have high strength and high modulus of elasticity in addition to improving heat resistance and workability. Then, as a resin composition which is a forming material of automobile parts and aircraft parts, many things containing a glass filler are known (for example, refer patent document 1).

Japanese Unexamined Patent Publication No. 62-129347

However, some glass fillers change color due to deterioration due to long-term use, and molded products obtained by using a resin composition containing such a glass filler may change in color and cause appearance defects due to long-term use. There is a problem with that.

The present invention has been made in view of such a situation, and has as its object to provide a molded article in which occurrence of appearance defects is suppressed even when used for a long period of time, and a resin composition for obtaining the molded article.

In order to solve the above problems, one aspect of the present invention is a resin composition containing an aromatic polysulfone, a liquid crystal polyester and a glass filler and having a boron oxide content of less than 1.4% by mass.

In one aspect of the present invention, it is preferable that the glass filler is glass fiber.

In one aspect of the present invention, the content of the liquid crystal polyester is preferably 10 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the total content of the aromatic polysulfone, the liquid crystal polyester and the glass filler.

In one aspect of the present invention, the content of the glass filler is preferably 3 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the total content of the aromatic polysulfone, liquid crystal polyester, and glass filler.

In one aspect of the present invention, it is preferable that the average fiber length of the glass fibers is 1 mm or more and 4 mm or less.

Moreover, one aspect of this invention is a molded object obtained by molding the said resin composition.

That is, the present invention includes the following aspects.

[1] A resin composition containing aromatic polysulfone, liquid crystal polyester, and a glass filler, wherein the content of boron oxide is less than 1.4% by mass with respect to the total mass of the resin composition.

[2] The resin composition according to [1], wherein the glass filler is glass fiber.

[3] The content of the liquid crystal polyester is 10 parts by mass or more and 30 parts by mass or less, [1] or [2], when the total content of the aromatic polysulfone, the liquid crystal polyester, and the glass filler is 100 parts by mass. The resin composition described in.

[4] Among [1] to [3], wherein the content of the glass filler is 3 parts by mass or more and 30 parts by mass or less when the total content of the aromatic polysulfone, the liquid crystal polyester, and the glass filler is 100 parts by mass. The resin composition described in any one.

[5] The resin composition according to any one of [2] to [4], wherein the glass fibers have an average fiber length of 1 mm or more and 4 mm or less.

[6] A molded article formed from the resin composition according to any one of [1] to [5].

ADVANTAGE OF THE INVENTION According to this invention, even if it uses for a long period of time, the appearance defect is suppressed, and the resin composition for obtaining the molded object can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the molded body which is one embodiment of this invention.

<Resin composition>

The resin composition of the present embodiment contains aromatic polysulfone, liquid crystal polyester, and a glass filler, and the content of boron oxide (hereinafter sometimes referred to as B ₂ O ₃ ) is 1.4 with respect to the total mass of the resin composition. It is a resin composition less than mass %. In the resin composition of the present embodiment, when the content of boron oxide is within such a range, and no boron oxide is contained or the content of boron oxide is small, change in color taste is suppressed over a long period of time, resulting in appearance defects. this is suppressed And even if the molded object obtained from the said resin composition is also used for a long period of time, generation|occurrence|production of the appearance defect by the change of color taste is suppressed.

In the resin composition of the present embodiment, the content of boron oxide is preferably 1.35% by mass or less, more preferably 1.3% by mass or less, and still more preferably 1.25% by mass or less with respect to the total mass of the resin composition. When the content of boron oxide is in such a range, the above-mentioned effect becomes higher.

In the resin composition of the present embodiment, the lower limit of the content of boron oxide is not particularly limited, and even if it is 0 mass% (substantially 0 mass%) with respect to the total mass of the resin composition, that is, the resin composition contains boron oxide. It doesn't have to contain it.

That is, the content of boron oxide in the resin composition of the present embodiment is 0 mass% or more and less than 1.4 mass%, preferably 0 mass% or more and 1.35 mass% or less, and more preferably 0 mass% or more and 1.3 mass% or less. and more preferably 0% by mass or more and 1.25% by mass or less.

As another aspect, the content of boron oxide in the resin composition of the present embodiment may be 0 mass% or more and 1 mass% or less, or 0 mass% or more and 0.7 mass% or less with respect to the total mass of the resin composition, It may be 0 mass % or more and 0.4 mass % or less, and may be substantially 0 mass %.

The content of boron oxide in the resin composition is determined by treating the resin composition at a high temperature (eg, 500 to 700° C.) and removing the resin component, and then determining the content of boron oxide in a residue obtained by a known method. It is obtained by measuring by Preferable methods for measuring the content of boron oxide include, for example, inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma emission spectrometry (ICP-AES), since the boron oxide content can be measured with high sensitivity. there is. In the present specification, "the resin composition does not contain boron oxide" and "the content of boron oxide in the resin composition is substantially 0% by mass relative to the total mass of the resin composition" means the resin It means that the content of boron oxide in the composition (ie, the content of boron oxide in the residue) is less than the detection limit. The detection limit value is different depending on the analysis device, but is usually several ppm or less (for example, 10 ppm or less).

If there is no abnormality in the manufacturing process of the resin composition of the present embodiment, when any raw material used among aromatic polysulfone, liquid crystal polyester and glass filler contains boron oxide, the resin composition also contains boron oxide. Therefore, in the resin composition, in order to reduce the boron oxide content as described above, a raw material containing no boron oxide or a low content of boron oxide may be used as a raw material.

Hereinafter, each raw material of the said resin composition is demonstrated.

(aromatic polysulfone)

The aromatic polysulfone typically includes a divalent aromatic group (that is, a residue formed by removing two hydrogen atoms bonded to the aromatic ring from an aromatic compound), a sulfonyl group (-SO ₂ -), and an oxygen atom. , It is a resin having repeating units including

The aromatic polysulfone preferably has at least one repeating unit (hereinafter sometimes referred to as “repeating unit (5)”) represented by the following general formula (5) from the viewpoint of heat resistance and chemical resistance. Aromatic polysulfone further comprises a repeating unit represented by the following general formula (6) (hereinafter sometimes referred to as "repeating unit (6)") or a repeating unit represented by the following general formula (7) (hereinafter, It may be referred to as "repeating unit (7)".) You may have at least one kind of other repeating unit.

(5) -Ph ¹ -SO ₂ -Ph ² -O-

(In the formula, Ph ¹ and Ph ² each independently represent a phenylene group; at least one hydrogen atom in the phenylene group may be each independently substituted with an alkyl group, an aryl group, or a halogen atom.)

(6) -Ph ³ -R-Ph ⁴ -O-

(In the formula, Ph ³ and Ph ⁴ each independently represent a phenylene group; at least one hydrogen atom in the phenylene group may be each independently substituted with an alkyl group, an aryl group, or a halogen atom. R is represents an alkylidene group, an oxygen atom or a sulfur atom.)

(7) -(Ph ⁵ ) _n -O-

(Wherein, Ph ⁵ represents a phenylene group; at least one hydrogen atom in the phenylene group may be each independently substituted with an alkyl group, an aryl group, or a halogen atom; n represents an integer of 1 to 3; , When n is 2 or more, a plurality of Ph ⁵ s may be the same or different.)

The phenylene group represented by any of Ph ¹ to Ph ⁵ may be a p-phenylene group, m-phenylene group, or o-phenylene group each independently, but from the viewpoint of further increasing the heat resistance and strength of the obtained resin, It is preferable that it is a p-phenylene group.

As the alkyl group which may substitute the hydrogen atom in the said phenylene group, a C1-C10 alkyl group is preferable, For example, a methyl group, an ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group , sec-butyl group, tert-butyl group, n-hexyl group, n-heptyl group, 2-ethylhexyl group, n-octyl group, n-nonyl group, and n-decyl group.

As the aryl group which may substitute the hydrogen atom in the phenylene group, an aryl group having 6 to 20 carbon atoms is preferable, and examples thereof include monocyclic aromatics such as a phenyl group, o-tolyl group, m-tolyl group and p-tolyl group. energy ; and condensed cyclic aromatic groups such as 1-naphthyl group and 2-naphthyl group.

As a halogen atom which may substitute the hydrogen atom in the said phenylene group, a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom are mentioned.

When the hydrogen atom in the phenylene group is substituted with these groups (i.e., an alkyl group, an aryl group or a halogen atom), the number of substituents the phenylene group has is not particularly limited, but each of the phenylene groups is independently preferably is one or two, more preferably one.

The alkylidene group represented by R is preferably an alkylidene group having 1 to 5 carbon atoms, and examples thereof include a methylene group, an ethylidene group, an isopropylidene group, a 1-butylidene group, and a 1-pentylidene group. there is.

The aromatic polysulfone may have only one type or two or more types of repeating units (5) to (7) each independently. Among them, the aromatic polysulfone preferably has 50 mol% or more and 100 mol% or less, and has 80 mol% or more and 100 mol% or less of the repeating unit (5) with respect to the total molar amount of all repeating units of the aromatic polysulfone. It is more preferable, and it is more preferable to have substantially only the repeating unit (5) as a repeating unit (ie, having 100 mol% of the repeating unit (5)).

The aromatic polysulfone can be produced, for example, by polycondensation of a dihalogenosulfone compound corresponding to a repeating unit constituting the aromatic polysulfone and a dihydroxy compound.

For example, an aromatic polysulfone having a repeating unit (5) is a compound represented by the following general formula (8) as a dihalogenosulfone compound (hereinafter sometimes referred to as “compound (8)”) and dihalogenosulfone compounds. It can be manufactured by polycondensing a compound represented by the following general formula (9) as a hydroxy compound.

(8) X ¹ -Ph ¹ -SO ₂ -Ph ² -X ²

(In the formula, X ¹ and X ² each independently represent a halogen atom; Ph ¹ and Ph ² have the same meaning as described above.)

(9) HO-Ph ¹ -SO ₂ -Ph ² -OH

(In the formula, Ph ¹ and Ph ² have the same meaning as described above.)

Further, the aromatic polysulfone having the repeating unit (5) and the repeating unit (6) is obtained by polycondensation of the compound (8) as a dihalogenosulfone compound and a compound represented by the following general formula (10) as a dihydroxy compound. By doing so, it can be produced.

(10) HO-Ph ³ -R-Ph ⁴ -OH

(In the formula, Ph ³ , Ph ⁴ and R have the same meaning as described above.)

Further, the aromatic polysulfone having the repeating unit (5) and the repeating unit (7) is obtained by polycondensation of the compound (8) as a dihalogenosulfone compound and a compound represented by the following general formula (11) as a dihydroxy compound. By doing so, it can be produced.

(11) HO-(Ph ⁵ ) _n -OH

(In the formula, Ph ⁵ and n have the same meaning as described above.)

The polycondensation is preferably carried out in a solvent using an alkali metal salt of carbonic acid. The alkali metal salt of carbonate may be an alkali carbonate that is a regular salt (for example, alkali metal carbonate), or an acidic alkali salt of alkali bicarbonate (for example, alkali hydrogen carbonate or alkali metal hydrogen carbonate), or both (for example, , alkali carbonate and alkali bicarbonate) may be used.

Preferable examples of the alkali carbonate include sodium carbonate and potassium carbonate.

Preferred examples of the alkali bicarbonate include sodium bicarbonate and potassium bicarbonate.

Examples of preferred solvents used for polycondensation include dimethylsulfoxide, 1-methyl-2-pyrrolidone, sulfolane (also referred to as 1,1-dioxothiolane), and 1,3-dimethyl-2-imidazoli. and organic polar solvents such as dinon, 1,3-diethyl-2-imidazolidinone, dimethyl sulfone, diethyl sulfone, diisopropyl sulfone, and diphenyl sulfone.

The aromatic polysulfone has a reduced viscosity of preferably 0.3 dL/g or more and 0.5 dL/g or less, more preferably 0.35 dL/g or more and 0.50 dL/g or less. In aromatic polysulfone, the higher the reduced viscosity, the better the heat resistance, strength and rigidity. However, when it is too high (ie, exceeding the above upper limit), the melting temperature and melt viscosity tend to be high, and the fluidity tends to be low. Here, "reduced viscosity" is a value obtained by measuring the resin concentration in a N,N-dimethylformamide solution at 1.0 g/100 ml at 25°C using an Ostwald viscometer.

In the polycondensation, if side reactions do not occur, the closer the molar ratio of the dihalogenosulfone compound to the dihydroxy compound is to 1: 1, the greater the amount of alkali metal salt of carbonic acid used, the higher the temperature during polycondensation, and , The longer the polycondensation time, the higher the degree of polymerization of the obtained aromatic polysulfone and the higher the reduced viscosity.

However, in reality, side reactions such as substitution reactions of halogeno groups with hydroxyl groups and depolymerization occur due to alkali hydroxides (for example, hydroxides of alkali metals) produced by-products. The degree of polymerization tends to decrease and the reduced viscosity tends to decrease.

Therefore, taking into account the degree of this side reaction, the molar ratio of the dihalogenosulfone compound and the dihydroxy compound, the amount of alkali metal salt of carbonate used, the temperature during polycondensation, and the time of polycondensation so as to obtain an aromatic polysulfone having a desired reduced viscosity. It is desirable to adjust

The aromatic polysulfone may be used alone or in combination of two or more.

In the resin composition of the present embodiment, the content of the aromatic polysulfone is preferably 30 parts by mass or more and 90 parts by mass or less based on 100 parts by mass of the total content of the aromatic polysulfone, liquid crystal polyester, and glass filler, It is more preferable that it is 40 parts by mass or more and 80 parts by mass or less, and it is more preferable that it is 55 parts by mass or more and 70 parts by mass or less.

(liquid crystalline polyester)

In the resin composition of the present embodiment, the liquid crystal polyester can improve the fluidity of the resin composition. Although the fluidity of the resin composition tends to be lowered due to the influence of aromatic polysulfone, the resin composition has appropriate fluidity by containing liquid crystal polyester.

The liquid crystal polyester is a liquid crystal polyester that exhibits liquid crystallinity in a molten state, and is preferably melted at a temperature of 450°C or lower. Further, the liquid crystal polyester may be liquid crystal polyester amide, liquid crystal polyester ether, liquid crystal polyester carbonate, or liquid crystal polyesterimide. It is preferable that liquid crystal polyester is wholly aromatic liquid crystal polyester formed using only an aromatic compound as a raw material monomer.

As a typical example of the liquid crystal polyester, an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid, and at least one compound selected from the group consisting of an aromatic diol, an aromatic hydroxyamine, and an aromatic diamine are polymerized (i.e., polycondensation is performed). ) liquid crystal polyester made of; liquid crystal polyester formed by polymerizing a plurality of types of aromatic hydroxycarboxylic acids; liquid crystal polyester formed by polymerizing an aromatic dicarboxylic acid and at least one compound selected from the group consisting of aromatic diols, aromatic hydroxyamines, and aromatic diamines; And liquid crystal polyester formed by polymerizing polyester, such as polyethylene terephthalate, and aromatic hydroxycarboxylic acid is mentioned. Here, aromatic hydroxycarboxylic acids, aromatic dicarboxylic acids, aromatic diols, aromatic hydroxyamines, and aromatic diamines may each independently use polymerizable derivatives instead of part or all of them.

Examples of polymerizable derivatives of compounds having a carboxyl group, such as aromatic hydroxycarboxylic acids and aromatic dicarboxylic acids, are derivatives obtained by converting a carboxyl group to an alkoxycarbonyl group or an aryloxycarbonyl group (ie, ester), a carboxyl group to a haloformyl group, and the like. Derivatives obtained by conversion (namely, acid halides) and derivatives obtained by converting a carboxyl group into an acyloxycarbonyl group (namely, acid anhydrides) are exemplified.

Examples of polymerizable derivatives of compounds having a hydroxyl group, such as aromatic hydroxycarboxylic acids, aromatic diols and aromatic hydroxyamines, include derivatives formed by converting hydroxyl groups into acyloxy groups by acylating (i.e., acylates). ) can be cited.

Examples of the polymerizable derivative of a compound having an amino group, such as aromatic hydroxyamine and aromatic diamine, include derivatives obtained by acylating an amino group and converting it into an acylamino group (namely, an acylate).

The liquid crystal polyester preferably has a repeating unit represented by the following general formula (1) (hereinafter sometimes referred to as "repeating unit (1)"), and the repeating unit (1) and the following general formula ( 2) a repeating unit represented by (hereinafter sometimes referred to as “repeating unit (2)”) and a repeating unit represented by the following general formula (3) (hereinafter sometimes referred to as “repeating unit (3)”) .) is more preferable.

(1) -O-Ar ¹ -CO-

(2) -CO-Ar ² -CO-

(3) -X-Ar ³ -Y-

(Wherein, Ar ¹ represents a phenylene group, a naphthylene group or a biphenylene group; Ar ² and Ar ³ are each independently a phenylene group, a naphthylene group, a biphenylene group or the following general formula (4) represents a group represented by ; X and Y each independently represent an oxygen atom or an imino group (-NH-); and at least one hydrogen atom among the groups represented by Ar ¹ , Ar ² or Ar ³ is independently , It may be substituted with a halogen atom, an alkyl group, or an aryl group.)

(4) -Ar ⁴ -Z-Ar ⁵ -

(In the formula, Ar ⁴ and Ar ⁵ each independently represent a phenylene group or a naphthylene group; Z represents an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, or an alkylidene group.)

Among the groups represented by Ar ¹ , Ar ² or Ar ³ , examples of the halogen atom substitutable for at least one hydrogen atom include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.

Among the groups represented by Ar ¹ , Ar ² or Ar ³ , the alkyl group capable of substituting at least one hydrogen atom is preferably an alkyl group having 1 to 10 carbon atoms, and examples thereof include a methyl group, an ethyl group, an n-propyl group, and isopropyl group. group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, n-hexyl group, n-heptyl group, 2-ethylhexyl group, n-octyl group, n-nonyl group and n-decyl group. Threading, etc. are mentioned.

Among the groups represented by Ar ¹ , Ar ² or Ar ³ , the aryl group capable of substituting at least one hydrogen atom is preferably an aryl group having 6 to 20 carbon atoms, and examples thereof include a phenyl group, o-tolyl group, and m-tolyl group. , monocyclic aromatic groups such as p-tolyl group, and condensed cyclic aromatic groups such as 1-naphthyl group and 2-naphthyl group.

When at least one hydrogen atom among the groups represented by Ar ¹ , Ar ² or Ar ³ is substituted with these groups, the number of substitutions is independently for each group represented by Ar ¹ , Ar ² or Ar ³ , preferably is one or two, more preferably one.

The alkylidene group is preferably an alkylidene group having 1 to 10 carbon atoms, and examples thereof include a methylene group, an ethylidene group, an isopropylidene group, an n-butylidene group and a 2-ethylhexylidene group. .

The repeating unit (1) is a repeating unit derived from aromatic hydroxycarboxylic acid.

Here, "derived" means that the chemical structure changes due to polymerization.

As the repeating unit (1), Ar ¹ is a 1,4-phenylene group (for example, a repeating unit derived from p-hydroxybenzoic acid), and Ar ¹ is a 2,6-naphthylene group (eg, For example, a repeating unit derived from 6-hydroxy-2-naphthoic acid) is preferable, and it is more preferable that Ar ¹ is a 2,6-naphthylene group.

The repeating unit (2) is a repeating unit derived from aromatic dicarboxylic acid.

As the repeating unit (2), those in which Ar ² is a 1,4-phenylene group (for example, a repeating unit derived from terephthalic acid) and those in which Ar ² is a 1,3-phenylene group (for example, in isophthalic acid) derived from a repeating unit), Ar ² is a 2,6-naphthylene group (for example, a repeating unit derived from 2,6-naphthalenedicarboxylic acid), and Ar ² is diphenylether-4,4' A diyl group (for example, a repeating unit derived from diphenyl ether-4,4'-dicarboxylic acid) is preferable, Ar ² is a 1,4-phenylene group, and Ar ² is 1 It is more preferable that it is a 3-phenylene group.

The repeating unit (3) is a repeating unit derived from an aromatic diol, aromatic hydroxylamine or aromatic diamine.

As the repeating unit (3), Ar ³ is a 1,4-phenylene group (for example, a repeating unit derived from hydroquinone, p-aminophenol or p-phenylenediamine), and Ar ³ is 4; 4'-biphenylene group (for example, repeating units derived from 4,4'-dihydroxybiphenyl, 4-amino-4'-hydroxybiphenyl or 4,4'-diaminobiphenyl ) is preferred.

When the liquid crystal polyester contains repeating unit (1), repeating unit (2) and repeating unit (3), the content of repeating unit (1) is the repeating unit (1), repeating unit (2) and repeating unit. When the total amount of (3) is 100 mol%, it is preferably 30 mol% or more, more preferably 30 mol% or more and 80 mol% or less, still more preferably 40 mol% or more and 70 mol% or less, particularly preferably is 45 mol% or more and 65 mol% or less.

When the liquid crystal polyester includes the repeating unit (1), the repeating unit (2) and the repeating unit (3), the content of the repeating unit (2) of the liquid crystal polyester is the repeating unit (1), the repeating unit ( When the total amount of 2) and repeating unit (3) is 100 mol%, it is preferably 35 mol% or less, more preferably 10 mol% or more and 35 mol% or less, still more preferably 15 mol% or more and 30 mol% or less, particularly preferably 17.5 mol% or more and 27.5 mol% or less.

When the liquid crystal polyester includes the repeating unit (1), the repeating unit (2) and the repeating unit (3), the content of the repeating unit (3) of the liquid crystal polyester is the repeating unit (1), the repeating unit ( When the total amount of 2) and repeating unit (3) is 100 mol%, it is preferably 35 mol% or less, more preferably 10 mol% or more and 35 mol% or less, still more preferably 15 mol% or more and 30 mol% or less, particularly preferably 17.5 mol% or more and 27.5 mol% or less.

That is, the liquid crystal polyester has a repeating unit (1) content of 30 mol% or more and 80 mol% or less, with the total amount of repeating unit (1), repeating unit (2) and repeating unit (3) as 100 mol%. It is preferable that the content of the repeating unit (2) is 10 mol% or more and 35 mol% or less, and the content of the repeating unit (3) is 10 mol% or more and 35 mol% or less.

In the liquid crystal polyester, the higher the content of the repeating unit (1), the easier the melt flowability, heat resistance, strength and rigidity are improved. The temperature required for molding tends to be high.

In the above liquid crystal polyester, the ratio between the content of repeating unit (2) and the content of repeating unit (3) is [content of repeating unit (2)]/[content of repeating unit (3)] (mol %/mol %), and is preferably 0.9/1 to 1/0.9, more preferably 0.95/1 to 1/0.95, still more preferably 0.98/1 to 1/0.98.

It is preferable that the said liquid crystal polyester has structural units each containing a 2,6-naphthylene group as repeating unit (1), repeating unit (2), and repeating unit (3). In the liquid crystal polyester, the content of repeating units containing a 2,6-naphthylene group is preferably 40 mol% or more and 75 mol% or less, with the total amount of all repeating units as 100 mol%. When the content of the repeating unit containing a 2,6-naphthylene group is within the above range, the obtained resin composition has better fluidity during melt processing and is more suitable for processing large-sized members.

In addition, the said liquid crystal polyester may have only 1 type of repeating units (1)-(3) each independently, and may have 2 or more types. Further, the liquid crystal polyester may have one or two or more repeating units other than the repeating units (1) to (3), but the content thereof is preferably 0 mol% relative to the total amount of all repeating units. It is more than 10 mol% or less, More preferably, it is 0 mol% or more and 5 mol% or less.

As another aspect, the liquid crystal polyester has at least one selected from the group consisting of repeating units (1), repeating units (2) and repeating units (3), and of the repeating units (1) to (3) The total content is 90 to 100 mol% with respect to the total amount of all repeating units, more preferably 95 to 100 mol%, and may be 100 mol%.

The liquid crystal polyester preferably has, as the repeating unit (3), a repeating unit in which X and Y are oxygen atoms, that is, a repeating unit derived from a predetermined aromatic diol, because the melt viscosity tends to be low. . It is more preferable that the repeating unit (3) is a repeating unit having only each of X and Y being an oxygen atom.

It is preferable to manufacture the said liquid crystal polyester by carrying out melt polymerization of the raw material monomer corresponding to the repeating unit which comprises this, and solid-phase polymerization of the obtained polymer (sometimes referred to as a prepolymer). Thereby, high molecular weight liquid crystal polyester with high heat resistance, strength, and rigidity can be manufactured with good operability. Melt polymerization may be carried out in the presence of a catalyst, and examples of the catalyst include metal compounds such as magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, potassium acetate, and antimony trioxide; - Nitrogen-containing heterocyclic compounds, such as dimethylaminopyridine and N-methylimidazole, are mentioned, and nitrogen-containing heterocyclic compounds are preferable.

The liquid crystal polyester has a flow start temperature of preferably 270°C or higher, more preferably 270°C or higher and 400°C or lower, and still more preferably 280°C or higher and 380°C or lower. The higher the liquid crystal polyester, the higher the flow initiation temperature, the easier to improve heat resistance, strength and rigidity. It tends to become easier, or the viscosity at the time of melting increases and the fluidity decreases.

In addition, "fluidization start temperature" is also called flow temperature or flow temperature, using a capillary rheometer, while raising the temperature at a rate of 4 ° C. / min under a load of 9.8 MPa (100 kgf / cm 2), liquid crystal polyester When melted and extruded from a nozzle with an inner diameter of 1 mm and a length of 10 mm, it is a temperature that exhibits a viscosity of 4800 Pa·s (48000 poise), and serves as a standard for the molecular weight of liquid crystal polyester (edited by Naoyuki Koide, “liquid crystal Polymer-Synthesis·Molding·Application-」, CMC Co., Ltd., June 5, 1987, p.95).

The said liquid crystal polyester may be used individually by 1 type, and may use 2 or more types together.

In the resin composition of the present embodiment, the content of the liquid crystal polyester is preferably 5 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the total content of the aromatic polysulfone, the liquid crystal polyester, and the glass filler, It is more preferable that it is 7 parts by mass or more and 40 parts by mass or less, and it is more preferable that it is 10 parts by mass or more and 30 parts by mass or less.

(glass filler)

The glass filler improves the heat resistance and workability of the molded body of the resin composition of the present embodiment, and imparts high strength and high modulus of elasticity to the molded body.

The glass filler is usually the raw material most likely to contain boron oxide.

The glass filler is not particularly limited as long as the effect of the present invention is not impaired, but examples of the material thereof include alkali glass for general use (eg, glass A), acid-resistant glass for chemical use (eg, glass C), low-density glass (eg, D glass), corrosion-resistant borosilicate glass (eg, ECR glass), and the like.

Among these, it is preferable that the material of the said glass filler is ECR glass from the viewpoint of high acid resistance, good mechanical and electrical quality, and excellent strength and the like of a molded article obtained.

The glass filler may be treated with a coupling agent such as a silane-based coupling agent or a titanium-based coupling agent as needed.

The content of boron oxide in the glass filler is not particularly limited, but is preferably 0 mass% or more and 12 mass% or less, more preferably 0 mass% or more and 10 mass% or less, still more preferably 0 mass% or more and 8 mass% or less. less than %. Even if the content of boron oxide in the glass filler is 0 mass% (substantially 0 mass%), that is, the glass filler does not need to contain boron oxide.

The boron oxide content of the glass filler is obtained by the same method as that of the boron oxide content of the resin composition. In addition, "the glass filler does not contain boron oxide" means that the content of boron oxide in the glass filler is less than the detection limit value at this time.

The shape of the glass filler is not particularly limited, and may be, for example, fibrous, plate, or granular, such as spherical, but is preferably fibrous because the effect of using the filler is higher. That is, it is preferable that the said glass filler is glass fiber.

Examples of the glass fibers include those produced by various methods such as hard glass fibers and milled glass fibers.

It is preferable that the average fiber length of the said glass fiber is 1 mm or more and 4 mm or less. When the average fiber length of the glass fibers is 1 mm or more, the effect as a reinforcing material in a molded article obtained from the resin composition containing glass fibers is more improved than when the average fiber length is less than 1 mm. Moreover, when the average fiber length of glass fiber is 4 mm or less, the thin wall fluidity of the resin composition is more improved than when the average fiber length exceeds 4 mm.

It is preferable that the fiber diameter (also referred to as single fiber diameter) of the glass fiber is 6 μm or more and 15 μm or less. When the fiber diameter of the glass fiber is 6 μm or more, handling of the resin composition becomes easier than when the fiber diameter is less than 6 μm. In addition, when the fiber diameter of the glass fiber is 15 μm or less, the fluidity of the resin composition is improved compared to the case where the fiber diameter exceeds 15 μm, and the effect of the glass fiber as a reinforcing material of a molded article formed from the resin composition is further improved. do.

In addition, in this specification, "average fiber length of glass fiber" means the value measured by the method described in JIS R 33420 "length of 7.8 mm strand" unless otherwise specified.

In addition, "fiber diameter of glass fiber" means a value measured by "Method A" among the methods described in JIS R 3420 "7.6 single fiber diameter" unless otherwise specified.

The weight-average fiber length and number-average fiber length of the fibrous filler are obtained from the external shape of the fibrous filler in the resin composition, and the measurement method is specifically described.

1.0 g of the resin composition is collected in a crucible, and treated at 600°C for 4 hours in an electric furnace to incinerate. The resultant residue is dispersed in methanol, spread on a slide glass, and a micrograph is taken, and the shape (fiber length) of the glass fiber is directly read from the photograph, and the average value is calculated. In addition, in calculation of an average value, a parameter is set to 400 or more. For each weight, the weight for each fiber length is calculated from the specific gravity of the glass fiber, and the total weight of the sample used is used in calculating the average value.

The said glass filler may be used individually by 1 type, and may use 2 or more types together.

In the resin composition of the present embodiment, the content of the glass filler is preferably 3 parts by mass or more and 30 parts by mass or less based on 100 parts by mass of the total content of the aromatic polysulfone, liquid crystal polyester, and glass filler, and 5 It is more preferable that it is 25 parts by mass or more by mass and is more preferably 10 parts by mass or more and 20 parts by mass or less.

In the resin composition of the present embodiment, when the content of the glass filler is within this range, a molded article having fluidity more suitable for molding large-sized parts and higher strength required for automobile and aircraft parts can be obtained.

(other ingredients)

The resin composition of the present embodiment may contain other components that do not correspond to any of the above aromatic polysulfone, liquid crystal polyester, and glass filler within a range that does not impair the effects of the present embodiment.

Examples of the other components include fillers other than the glass filler (hereinafter sometimes referred to as "other fillers"), additives, and resins other than the aromatic polysulfone and liquid crystal polyester (hereinafter referred to as "other resins"). It is sometimes called.) and the like.

Said other component may be used individually by 1 type, and may use 2 or more types together.

The other filler may be a fibrous filler, a plate-shaped filler, or other granular filler such as a spherical filler other than a fibrous and plate-shaped filler.

Moreover, an inorganic filler may be sufficient as the said other filler, and an organic filler may be sufficient as it.

Examples of the fibrous inorganic filler include carbon fibers such as plate-based carbon fibers and pitch-based carbon fibers; ceramic fibers such as silica fibers, alumina fibers, and silica alumina fibers; metal fibers such as stainless fibers; and whiskers such as potassium titanate whiskers, barium titanate whiskers, wollastonite whiskers, aluminum borate whiskers, silicon nitride whiskers, and silicon carbide whiskers.

Examples of the fibrous organic filler include polyester fibers and aramid fibers.

Examples of the plate-like inorganic filler include talc, mica, graphite, wollastonite, barium sulfate and calcium carbonate. Mica may be white mite, phylogenetic mite, fluorine salt phylogenetic mite, or quasi-silico mica.

Examples of the granular inorganic filler include silica, alumina, titanium oxide, boron nitride, silicon carbide and calcium carbonate.

When the resin composition of the present embodiment contains the other fillers, the content of the other fillers in the resin composition is greater than 0 parts by mass relative to 100 parts by mass of the total content of the aromatic polysulfone and the liquid crystal polyester. It is preferably 100 parts by mass or less.

Examples of the additives include antioxidants, heat stabilizers, ultraviolet absorbers, antistatic agents, surfactants, flame retardants and colorants.

When the resin composition of the present embodiment contains the additive, the content of the additive in the resin composition is greater than 0 parts by mass and 5 parts by mass relative to 100 parts by mass of the total content of the aromatic polysulfone, the liquid crystal polyester, and the glass filler. It is preferable that it is less than a mass part.

Examples of the other resins include thermoplastic resins other than aromatic polysulfones such as polypropylene, polyamide, polyester, polyphenylene sulfide, polyether ketone, polycarbonate, polyphenylene ether, and polyetherimide; Thermosetting resins, such as a phenol resin, an epoxy resin, a polyimide resin, and a cyanate resin, are mentioned.

When the resin composition of the present embodiment contains the other resin, the content of the other resin in the resin composition is greater than 0 part by mass when the total content of the aromatic polysulfone and the liquid crystal polyester is 100 parts by mass. It is large and preferably 20 parts by mass or less.

As described above, the raw material used with the highest possibility of containing boron oxide is the glass filler, but when raw materials other than the glass filler have a possibility of containing boron oxide, as such a raw material, its amount, etc. After taking into consideration, the boron oxide content may be used within an appropriate range.

In this embodiment, for example, the content of boron oxide in the resin composition can be adjusted to a predetermined amount by using together a plurality of types of glass fillers having a known content of boron oxide.

The resin composition of the present embodiment can be produced by mixing the above-mentioned aromatic polysulfone, liquid crystal polyester, glass filler, and other components used as necessary in one batch or in an appropriate order.

The resin composition of the present embodiment is preferably pelletized by melt-kneading the aromatic polysulfone, liquid crystal polyester, glass filler, and other components used as necessary using an extruder.

The extruder preferably has a cylinder, at least one screw disposed in the cylinder, and at least one supply port formed in the cylinder, and more preferably at least one vent portion formed in the cylinder.

That is, one aspect of the method for producing the resin composition of the present embodiment is to mix the aromatic polysulfone, liquid crystal polyester, glass filler, and other components used as necessary, and melt-knead the mixture with an extruder. and extruding the melt-kneaded product.

<Formed object>

A molded article, which is an embodiment of the present invention, is a molded article obtained by molding the resin composition of the present embodiment.

The molded body of the present embodiment does not contain boron oxide, or the content of boron oxide is suppressed to a low level by molding the resin composition as described above. As a result, even if the molded body is used for a long period of time, the change in color taste is suppressed, and the appearance defect is suppressed. That is, the molded article has a color difference before and after the accelerated test described below of 0 or more and 1.1 or less, preferably 0 or more and 0.7 or less.

When the content of boron oxide in the resin composition is greater than a specific value, the reason why appearance defects occur in the molded article after long-term use is not clear, but in the molded article, the surface or near the surface that is easily affected by the external environment It is speculated that this is because boron oxide is ionized and the ions move inside the molded body, causing a change in the internal composition of the molded body. For example, when the used glass filler contains boron oxide, boron oxide is ionized in the glass filler contained in the molded body, and the ions are eluted from the glass filler, thereby resulting in the composition of the glass filler and the internal composition of the molded body. It is speculated that there may be a change in

When the content of boron oxide in the resin composition is greater than a specific value, the same reason why appearance defects occur in the molded body over time, is it not because the internal composition of the resin composition changes? It is speculated that

As a molding method of the resin composition, a melt molding method is preferable, and examples of the melt molding method include an injection molding method; Extrusion molding methods, such as a T-die method and an inflation method; compression molding method; blow molding method; vacuum forming method; A press molding method etc. are mentioned. Among these, it is preferable that the molding method of the said resin composition is an injection molding method.

That is, one side surface of the molded article of the present embodiment is a molded article obtained by injection molding the resin composition.

Examples of products and parts composed of the molded body of the present embodiment include bobbins such as optical pickup bobbins and trans bobbins; relay parts such as relay cases, relay bases, relay sprues, and relay armatures; connectors such as RIMM, DDR, CPU socket, S/O, DIMM, Board to Board connector, FPC connector, card connector; reflectors such as lamp reflectors and LED reflectors; holders such as lamp holders and heater holders; Diaphragms, such as a speaker diaphragm; Separation tanks, such as a separation tank for copiers and a separation tank for printers; camera module parts; switch parts ; motor parts ; sensor parts; hard disk drive parts ; tableware such as ovenware; vehicle parts; battery components; aircraft parts; Sealing members, such as the sealing member for semiconductor elements and the sealing member for coils, etc. are mentioned.

One aspect of the resin composition, which is an embodiment of the present invention,

containing aromatic polysulfone, liquid crystal polyester, and glass filler;

The content of boron oxide is 0% by mass or more and less than 1.4% by mass with respect to the total mass of the resin composition;

When the total content of the aromatic polysulfone, liquid crystal polyester, and glass filler is 100 parts by mass,

The content of the aromatic polysulfone is 30 parts by mass or more and 90 parts by mass or less,

The content of the liquid crystal polyester is 5 parts by mass or more and 50 parts by mass or less,

Content of the said glass filler is 3 parts by mass or more and 30 parts by mass or less.

It is a resin composition.

One aspect of the resin composition, which is an embodiment of the present invention,

It is a resin composition containing an aromatic polysulfone, a liquid crystal polyester, and a glass filler;

In the resin composition, the content of boron oxide is 0% by mass or more and less than 1.4% by mass with respect to the total mass of the resin composition;

The aromatic polysulfone,

has at least the repeating unit (5) described above;

preferably has a repeating unit derived from aromatic polyethersulfone;

Further, the aromatic polysulfone has a reduced viscosity of 0.3 dL/g or more and 0.50 dL/g or less;

The liquid crystal polyester,

It has at least the repeating unit (1), repeating unit (2) and repeating unit (3) described above,

Preferably, at least a repeating unit derived from 6-hydroxy-2-naphthoic acid, a repeating unit derived from 2,6-naphthalenedicarboxylic acid, a repeating unit derived from terephthalic acid, and a repeating unit derived from hydroquinone has a repeating unit of ;

The glass filler,

It contains glass fibers having an average fiber length of 1 mm or more and 4 mm or less, and the content of boron oxide in the glass filler is 0 mass% or more and 12 mass% or less,

Preferably, it is an ECR glass having an average fiber length of 1 mm or more and 4 mm or less,

When the total content of the aromatic polysulfone, liquid crystal polyester, and glass filler is 100 parts by mass,

The content of the aromatic polysulfone is 30 parts by mass or more and 90 parts by mass or less,

The content of the liquid crystal polyester is 5 parts by mass or more and 50 parts by mass or less,

Content of the said glass filler is 3 mass parts or more and 30 mass parts or less;

It is a resin composition.

One side of the molded body, which is an embodiment of the present invention, is a test piece having a size of 64 mm × 64 mm × 3 mm prepared from a resin composition according to an embodiment of the present invention, immersed in 100 ml of a sulfuric acid aqueous solution having a pH of 2.0, and 120 For the test piece after the accelerated test subjected to the accelerated test heated at ° C. for 500 hours and the test piece before the accelerated test, UV protection was performed under the conditions of an illumination receiving optical system D65, a C light source, an observation field of view of 10 °, and a measurement diameter of 25.4 mm. When the brightness and chromaticity are measured with a color difference meter and the color difference of the test piece before and after the accelerated test is obtained, the color difference is 0 or more and 1.1 or less.

Another aspect of the resin composition of one embodiment of the present invention is a resin composition capable of producing a molded article having the above characteristics.

Example

Hereinafter, the present invention will be described in more detail with reference to specific examples. However, this invention is not limited at all to the Example shown below.

[Production Example 1]

<Manufacture of liquid crystal polyester>

6-hydroxy-2-naphthoic acid (1034.99 g, 5.5 mol), 2,6-naphthalenedicarboxylic acid (378.33 g . 12 mol), and 1-methylimidazole (0.17 g) as a catalyst. After replacing the gas in the reactor with nitrogen gas, the temperature was raised from room temperature to 145°C over 15 minutes while stirring under a nitrogen gas stream, and refluxed at 145°C for 1 hour.

Then, while distilling off by-produced acetic acid and unreacted acetic anhydride, the temperature was raised from 145°C to 310°C over 3 hours and 30 minutes, held at 310°C for 3 hours, and solid prepolymer (reaction mixture) was taken out, and the prepolymer was cooled to room temperature.

Subsequently, this prepolymer was pulverized using a pulverizer until the particle diameter became about 0.1 mm to 1 mm. The resulting pulverized product was heated in a nitrogen atmosphere from room temperature to 250°C over 1 hour, heated from 250°C to 302°C over 8 hours and 40 minutes, and maintained at 302°C for 5 hours to perform solid phase polymerization. The solid polymer was cooled to obtain powdery liquid crystal polyester (hereinafter sometimes referred to as "LCP1"). The flow start temperature of the obtained liquid crystal polyester was 320 degreeC.

About the obtained liquid crystalline polyester, content of the repeating unit was analyzed and confirmed by the following method.

That is, a liquid crystal polyester sample of about 100 mg was placed in a tube made of SUS, about 5 ml of methanol was added, a stopper was tightly capped, and the polymer was decomposed by heat treatment at 300°C for 40 minutes in a sand bath.

After cooling, tetrahydrofuran (hereinafter sometimes referred to as THF) was added to the contents for recovery, and diluted with THF using a 50 ml volumetric flask.

The obtained THF solution was analyzed using gas chromatography (“Agilent 6890N” manufactured by Agilent Technologies) to measure the content of each repeating unit.

As a result, the liquid crystal polyester obtained above has 55 mol% of the repeating unit (1) in which Ar ¹ is a 2,6-naphthylene group, with the total amount of all repeating units as 100 mol%, and Ar ² is 2,6 - 17.5 mol% of repeating unit (2) which is a naphthylene group, 5 mol% of repeating unit (2) in which Ar ² is a 1,4-phenylene group, and Ar ³ is a 1,4-phenylene group (3 ) had 22.5 mol%.

[Example 1]

<Manufacture of resin composition>

Aromatic polyethersulfone ("Sumika Accel (registered trademark) PES 3600P" manufactured by Sumitomo Chemical Co., Ltd., reduced viscosity 0.36 dL/g, hereinafter sometimes referred to as "PES1") (64 parts by mass), LCP1 (16 parts by mass) ), glass fiber 1 ("Advantex" manufactured by Owens Corning Co., Ltd., fiber diameter 10.5 µm, average fiber length 3.0 mm, B ₂ O ₃ content 0% by mass, hereinafter sometimes referred to as "GF1") (20 parts by mass ) to obtain the resin composition 1. Each compounding component and its compounding quantity are shown in Table 1.

<Manufacture of molded body>

Using an injection molding machine ("UH1000-80" manufactured by Nissei Resin Industry Co., Ltd.), cylinder temperature 380 ° C., mold temperature 150 ° C., injection speed 100 mm / sec, holding pressure 700 kg / cm 2, cooling time 25 seconds Under the condition of, a molded body having a size of 64 mm × 64 mm × 3 mm was produced from the resin composition obtained above.

<Evaluation of molded body>

[Accelerated test]

A disk-shaped test piece having a diameter of 20 mm was cut out from the manufactured molded body. Using an autoclave (manufactured by Pressure Glass Co., Ltd.), the obtained test piece was immersed in a pH 2.0 sulfuric acid aqueous solution (100 ml) and heated at 120°C for 500 hours.

(measurement of color difference)

Using a color difference meter ("CM-3600d" manufactured by Konica Minolta Co., Ltd.) under the conditions of illumination light receiving optical system D65, C light source, observation field of view of 10°, and measurement diameter of 25.4 mm, without UV protection, test pieces before and after the accelerated test. , the brightness (L ^* : SCE method) and chromaticity (a ^* , b ^* : SCE method) according to the L ^* a ^* b ^* color system were measured, and the color difference (ΔE: SCE method) was obtained. A result is shown in Table 2.

(Visual observation of discoloration degree)

The test piece before and after the accelerated test was cut, and the cut surface (cross section) was visually observed, and the degree of discoloration of the test piece after the accelerated test was evaluated according to the following criteria. A result is shown in Table 2.

A: Discoloration is not recognized.

B: Very little discoloration is recognized, but there is no problem in practical use.

C: Clear discoloration is observed.

[Example 2]

<Manufacture of resin composition>

PES1 (64 parts by mass), LCP1 (16 parts by mass), GF1 (15 parts by mass), glass fiber 2 (CS03JAPX-1, manufactured by Owens Corning Japan Co., Ltd., fiber diameter 10.5 μm, average fiber length 3.0 mm, B ₂ O ₃ Resin composition 2 was obtained by mixing 7 mass % of content (it may be hereinafter referred to as "GF2") (5 parts by mass). Each compounding component and its compounding quantity are shown in Table 1.

<Manufacture and evaluation of molded body>

A molded article was produced and evaluated in the same manner as in Example 1, except that Resin Composition 2 was used instead of Resin Composition 1. A result is shown in Table 2.

[Example 3]

<Manufacture of resin composition>

As shown in Table 1, resin composition 3 was obtained by mixing PES1 (64 parts by mass), LCP1 (16 parts by mass), GF1 (10 parts by mass) and GF2 (10 parts by mass).

<Manufacture and evaluation of molded body>

A molded article was produced and evaluated in the same manner as in Example 1, except that Resin Composition 3 was used instead of Resin Composition 1. A result is shown in Table 2.

[Example 4]

<Manufacture of resin composition>

As shown in Table 1, resin composition 4 was obtained by mixing PES1 (64 parts by mass), LCP1 (16 parts by mass), GF1 (5 parts by mass) and GF2 (15 parts by mass).

<Manufacture and evaluation of molded body>

A molded article was produced and evaluated in the same manner as in Example 1, except that Resin Composition 4 was used instead of Resin Composition 1. A result is shown in Table 2.

[Comparative Example 1]

<Manufacture of resin composition>

As shown in Table 1, resin composition R1 was obtained by mixing PES1 (64 parts by mass), LCP1 (16 parts by mass) and GF2 (20 parts by mass).

<Manufacture and evaluation of molded body>

A molded article was produced and evaluated in the same manner as in Example 1, except that Resin Composition R1 was used instead of Resin Composition 1. A result is shown in Table 2.

As is clear from the above results, the molded articles of Examples 1 to 4 obtained from the resin composition with a low content of boron oxide had a small color difference, that is, a change in color tone after the accelerated test, and discoloration was suppressed even under visual observation, and they were used for a long period of time. Also, occurrence of poor appearance was suppressed. And, from the comparison between Examples 1 to 3 and Example 4, it was confirmed that the lower the content of boron oxide in the resin composition, the higher the effect of suppressing discoloration in the molded article after the accelerated test.

On the other hand, the molded article of Comparative Example 1 obtained from the resin composition having a high content of boron oxide had a large color difference after an accelerated test, and discoloration was not suppressed even under visual observation, and appearance defects occurred when used for a long period of time.

INDUSTRIAL APPLICABILITY The present invention is extremely useful industrially because it can be used for molded products requiring suppression of appearance defects over time, including automobile parts and aircraft parts.

Claims (6)

It contains aromatic polysulfone, liquid crystal polyester and a glass filler, and the content of boron oxide is 0.7% by mass or less with respect to the total mass of the resin composition,
The liquid crystal polyester is a resin composition in which the content of repeating units containing a 2,6-naphthylene group is 40 mol% or more and 75 mol% or less, with the total amount of all repeating units as 100 mol%. According to claim 1,
The resin composition in which the said glass filler is glass fiber. According to claim 1,
The resin composition in which the content of the liquid crystal polyester is 10 parts by mass or more and 30 parts by mass or less when the total content of the aromatic polysulfone, the liquid crystal polyester, and the glass filler is 100 parts by mass. According to claim 1,
The resin composition in which the content of the glass filler is 3 parts by mass or more and 30 parts by mass or less based on 100 parts by mass of the total content of the aromatic polysulfone, the liquid crystal polyester, and the glass filler. According to claim 2,
The resin composition in which the average fiber length of the said glass fiber is 1 mm or more and 4 mm or less. A molded article of the resin composition according to any one of claims 1 to 5.

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